JPH0651683U - Connection structure of rubber hose and metal pipe - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a connecting portion structure capable of easily connecting a rubber hose and a metal pipe. [Structure] A metal pipe tip portion 1a formed in a concavo-convex shape from a non-opening end side of a tubular caulking metal fitting 3 having one end opened.
Insert and insert the caulking metal fitting and the metal pipe 1 in this state.
Is fixed by brazing or welding, on the other hand, one end of the rubber hose 4 is inserted into the inside of the caulking metal fitting, and the inner hole 4a of the hose is externally fitted to the tip portion of the metal pipe, and the caulking metal fitting is caulked. Then, the metal hose is tightly communicated with the rubber hose by elastically pressing the rubber hose with the body portion 3a.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a structure for connecting a rubber hose and a metal pipe used in a pipe system for lubricating oil or fuel oil.

[0002]

[Prior art]

 The rubber hose and the metal pipe may be connected by a pipe system such as lubricating oil or fuel oil for automobiles, and the connection part is as follows for a pipe with a relatively small passage.

That is, as shown in FIG. 3, a joint 2 is brazed to a metal pipe 1, and a cylindrical caulking metal fitting 3 having an opening at one end is brazed to the joint 2, while one of the rubber hose 4 is Insert one end into the caulking metal fitting 3 and fit it onto the joint 2a of the joint 2, and then caulk the body portion 3a of the caulking metal fitting 3 to attach the caulking metal fitting 3 to the peripheral portion of the rubber hose 4. The structure is such that the rubber hose 4 and the joint 2 are tightly communicated with each other by elastically pressing.

[0004]

[Problems to be solved by the device]

 It is an object of the present invention to provide a structure for connecting a rubber hose and a metal pipe, which makes it possible to connect a rubber hose and a metal pipe more easily than the structure of the conventional connecting part described above.

[0005]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention inserts a metal pipe tip portion formed into an uneven shape from a non-opening end side of a tubular caulking metal fitting with one end open, and at this state, braces the caulking metal fitting and the metal pipe. On the other hand, one end of the rubber hose is inserted inside the caulking metal fitting, and the inner hole of the hose is externally fitted to the end part of the metal pipe, and the caulking metal fitting is caulked. The metal hose is tightly communicated with the metal hose by elastically pressing the rubber hose at the body.

[0006]

[Action]

 The metal pipe and the rubber hose are brazed to the metal pipe and are tightly connected only by the caulking metal fittings, which eliminates the need for conventional joints and brazing.

[0007]

【Example】

 1 is a sectional view showing a structure of a connecting portion according to an embodiment of the present invention, and FIG. 2 is a sectional view taken along line xx of FIG.

In the present invention, the tip portion 1a of the metal pipe 1 is formed into an uneven shape. At this time, it is different from the one shown in the drawing, but it is preferable to form it into a bamboo shape, that is, a convex portion for restricting the withdrawal of the rubber hose 4 fitted on this is formed at appropriate intervals in the longitudinal direction. It is installed at the bottom and is designed to be tapered.

The crimping metal fitting 3 is the same as the conventional one, that is, it has a cylindrical shape with an opening at one end, so that the rubber hose 4 can be easily inserted into the opening end if necessary. In addition to molding the flare portion 3b, a hole 3c for inserting the metal pipe 1 is formed on the non-opening end side. The caulking metal fitting 3 shown by a solid line in FIG. 1 is after caulking, and before caulking, the body portion 3a is slightly smaller than the outer diameter of the rubber hose 4 as shown by a phantom line. It has a large diameter.

The tip portion 1a of the metal pipe 1 is inserted into the caulking metal fitting 3 through the hole 3c, and the caulking metal fitting 3 and the metal pipe 1 are fixed in this state. This fixing is done, for example, by brazing or welding.

Then, one end of the rubber hose 4 is inserted into the caulking metal fitting 3 through its opening as far as possible into the metal fitting 3, and the inner hole 4a of the hose 4 is inserted into the tip portion 1a of the metal pipe 1. To fit on.

After that, the caulking metal fitting 3 is caulked, that is, the body portion 3a of the metal fitting 3 is clamped by a caulking tool, and is shaped into a recess as shown by the solid line in FIG.

Thus, the rubber hose 4 is elastically pressed by the body portion 3a of the metal fitting 3 so that the inner hole 4a and the tip portion 1a of the metal pipe 1 are brought into pressure contact with each other, and the metal pipe 1 and the rubber hose 4 are sealed. It will be in a state of being communicated with each other.

It is optional to provide the reinforcing layer 4b in the thick portion of the rubber hose 4.

[0015]

[Effect of device]

 According to the present invention configured as described above, the rubber hose and the metal pipe can be tightly communicated with each other by the caulking metal fitting fixed to the metal pipe, which eliminates the need for the conventional joint and the brazing process thereof. Is.

[Submission date] February 22, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] 0003

[Correction method] Change

[Correction content]

That is, as shown in FIG. 1 , a joint 2 is brazed to a metal pipe, and a cylindrical caulking metal fitting 3 having an opening at one end is brazed to the joint 2, while one end of a rubber hose 4 is connected. Insert it inside the caulking metal fitting 3 and fit it onto the joint 2a of the joint 2, and then caulk the body portion 3a of the caulking metal fitting 3 to press the metal 3 against the peripheral portion of the rubber hose 4. The rubber hose 4 and the joint 2 are closely connected to each other.

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0007

[Correction method] Change

[Correction content]

[0007]

【Example】

Figure 2 is a sectional view showing a connecting portion structure according to an embodiment of the present invention, FIG. 3 is a x-x sectional view of FIG.

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0009

[Correction method] Change

[Correction content]

The caulking metal fitting 3 is the same as the conventional one, that is, it has a cylindrical shape with an opening at one end, and facilitates insertion of the rubber hose 4 at the opening end if necessary. In addition to molding the flare portion 3b, a hole 3c for inserting the metal pipe 1 is formed on the non-opening end side. The caulking metal fitting 3 shown by the solid line in FIG. 2 is after caulking, and before the caulking treatment, its body portion 3a is slightly smaller than the outer diameter of the rubber hose 4 as shown by the phantom line. It has a large diameter.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a connection structure according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along line xx of FIG.

FIG. 3 is a diagram of a conventional example.

[Explanation of symbols]

 1 Metal pipe 1a Tip part 3 Caulking metal fitting 4 Rubber hose 4a Inner hole of rubber hose

─────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] February 22, 1993

[Procedure amendment 4]

[Document name to be amended] Statement

[Name of item to be corrected] Brief description of the drawing

[Correction method] Change

[Correction content]

[Brief description of drawings]

FIG. 1 is a diagram of a conventional example.

FIG. 2 is a cross-sectional view showing a connection structure according to an embodiment of the present invention.
It is a figure.

FIG. 3 is a sectional view taken along line xx of FIG.

[Explanation of symbols] 1 metal pipe 1a tip part 3 caulking metal fitting 4 rubber hose 4a inner hole of rubber hose

Claims (1)

[Scope of utility model registration request] 1. A tubular caulking metal fitting having an opening at one end is inserted with an end portion of an uneven metal pipe from the non-opening end side, and in this state, the caulking metal fitting and the metal pipe are brazed or welded. On the other hand, insert one end of the rubber hose into the inside of the caulking metal fitting, and fit the inner hole of the hose to the tip part of the metal pipe externally, further caulking the caulking metal fitting, and press the rubber hose with its body. A structure for connecting a rubber hose and a metal pipe, which is characterized in that the metal pipe and the rubber hose are tightly communicated with each other.